The cost of a British passport is set to increase. Currently the cost for adults is £72.50. From 27 March 2018 online applications will cost £75.50 and postal applications will cost £85. Costs for under 16s will go up from £46 to £49 online or £58.50 by post.
When you renew your passport, you can carry across up to nine months from your old one, so if your passport is due to expire before 27 December 2018, it would be worth renewing now.